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Even the most strident Tebowmaniacs have to admit this is a concern. (It's rare to see any quarterback throw for negative yardage.)

Patriots coach Bill Belichick said Tebow "definitely" was improving during camp, but his preseason results might force Belichick to consider keeping an extra tight end or linebacker over Tebow. The former Florida quarterback was asked if he's worried about making the team.

"No," Tebow said Tuesday, via the Boston Herald. "I'm just worried about improving every single day."

Belichick won't publicly promise that Tebow will be on the team, but that's no surprise. It's telling that the Patriots coach pointed out Tebow has a different skill set than a traditional quarterback. He's being judged on a different scale.

"I think if you look at the entire week last week, it would look different than the game did," Belichick added. "In some cases, the game looked better for some players, and in some cases, the game didn't look as good as some other things during the week."